Bucksaw-frame.



No;'791,513. I PATENTBD JUNE 6,1905.

. I S.TOLES.

BUOKSAW FRAME.

APPLIUATION FILED SEPT. 21, 1904.

Patented June 6, 1905.

PATENT OFFICE.

srLAs TOLES, OF GALT, CANADA.

BUCKSAW-FRAME.

SPECIFICATION forming part of Letters Patent No. 791,513, dated June 6,1905.

Application filed September 21,1904. Serial No. 225,367.

To all whom it may concern.-

Be it known that I, SrLAs TOLES, sawmaker, a subject of the King ofGreat Britain, residing in the town of Galt, in the county of Waterloo,in the Province of Ontario, Ganada, have invented certain new and usefulImprovements in Bucksaw-Frames, of which the following is aspecification.

My invention relates to improvements in bucksaw-frames and the object ofmy invention is to. construct a bucksaw-frame that will not be warpedout of shape either by the effects of the climate or by the stress onthe frame caused by the tightening of the sawblade; and it consists,essentially, in providing the bucksaw-frame with a brace-rod, ashereinafter more particularly explained.

Figure 1 is a side elevation of the bucksawframe constructed accordingto myinvention, and Fi 2 is an end elevation of same.

In the drawings like characters of reference indicate correspondingparts in each figure.

As is well known, the means ordinarily used for tightening the saw-bladeis situated above the ordinary brace, and the action of the forces uponthe bucksaw-frame moves the lower ends of same in the directionsopposite those indicated by arrows at those points in Fig. 1. The forcesexerted by the action of the said means operate opposite to those forcesexerted by my im roved means for this purpose and decided y tend tobuckle the brace. Even when the saw-blade is not held taut the action ofthe said ordinary means for making said saw-blade taut is more or lessexerted to buckle said brace. These forces, coupled with the effects ofthe climate, warp the ordinary bucksaw-frame. Now by means of mybrace-rod I exert forces against the ordinary brace which counteract thebuckling forces caused by the tightening of the saw-blade and theeffects of the climate. This is not possible with the ordinary means nowused for tightening the saw-blade.

A is the short end of the saw-frame, and B long end of same. Suitablysecured at one end in the end A is a saw-blade C. By means of anythreaded end D projecting through the long end B and any suitable nut Ethereon the saw-blade is tightened.

F is the usual brace, suitably secured in the ends A and B.

The brace-rod G is composed of a first horizontal portion G and a secondhorizontal portion G which are bent around the ends A and B on the sameside of the saw-frame above the ends I of the brace F, and theirportions H extend at a downward inner angle on the opposite side of thesaw-frame and are secured 1n said brace near its ends I in any suitablemanner. As shown in the drawings, the ends of the portions II arethreaded and are secured in place by means of the threaded nuts h. Wherethe portions G andG bend around the ends Aand B, as indicated at a,Ipreferably notch said ends, so as to more securely kee said brace-rodin position. It will be notice that the brace-rodGis looped around thebolt or pin J, securedin the braceF. This construction places thehorizontal portion G higher up in the plane occupied by said horizontalportions than the position occupied therein by the horizontal portion G,but yet said horizontal portions are parallel toeach other. When thesaw-blade is tightened up, the lower ends of the ends A and B are movedin the directions indicated by arrows, thuscausing forces to act uponthe portions G and G of the brace-rod G, which, together with theirportions I-I, exert forces in the directions indicated by arrows uponsaid brace to counteract any buckling forces that may be exertedthereupon, the buckling forces being indicated by arrows with tails. Byso constructing'the brace-rod G and attaching it to the brace F it willbe seen that the tightening of the saw-blade causes said portions H topull outward and upward on the brace F to counteract the effects of anybuc kling forces. Further, the support given the brace F at its middleportion by the bracerod G prevents same from sagging.

the construction of my saw without departing from the spirit of myinvention,

What I claim as my invention is 1. A bueksaw comprising the short end;the long end; the saw-blade held therein; means attached to saidsaw-blade for tightening same; a brace; a brace-rod provided near itsmiddle portion with a loop which provides a lower horizontal portion andan upper horizontal portion both being parallel and in the same planeand on the same side of the saw-frame, the said portions being bentaround said ends above where the ends of said brace are secured theretoto the opposite side of said saw-frame and having portions extending ata downward inner angle on said opposite side of the saw-frame andsecured to said brace near its attached ends, and a bolt or pin securedin said brace and projecting thereabove and resting in the loop formedin said brace-rod, as and for the purpose specified.

2. A bucksaw comprising the short end; the long end; the saw-blade heldtherein; means attached to said saw-bladefor tightening same; anupwardly-eurved brace; a brace-rod provided near its middle portion witha loop which provides a lower horizontal portion and an upper horizontalportion both being parallel and in the same plane and on the same sideof the saw-frame, the said portions being bent around said ends abovewhere the ends of said brace are secured thereto to the opposite side ofsaid saw-frame and having portions extending at a downward inner angleon said opposite side of the saw-frame and provided with threaded endspassed through said brace near its attached ends; nuts screwing on saidthreaded ends, and a bolt or pin secured in said brace and projectingthereabove and resting in the loop formed in said brace-rod, as and forthe purpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses;

SILAS TOLES.

Witnesses:

E. W. MACKENZIE, FREDK. G. ALLENBY.

